docs: def conditional(
          b: bool,
          branch_true: Any,
          branch_false: Any=None) -> Any:
      """
      Control statement to follow a branch
      in workflow. Equivalent to the `if` statement
      in standard Python.
  
      The quote function delay the evaluation of the branches
      until the boolean is evaluated.
  
      :param b:
         promised boolean value.
      :param branch_true:
         statement to execute in case of a true predicate.
      :param branch_false:
         default operation to execute in case of a false predicate.
      :returns: :py:class:`PromisedObject`
      """
      return schedule_branches(b, quote(branch_true), quote(branch_false))